So, I tried something new last year and it seemed to work well.
When I planted my tiny little seedlings in the garden, I covered them with cloches made from milk cartons. It's not one of the most attractive things, but it worked well!
To make these cloches, simply cut the top of the milk carton off at about the point where the sides become straight. Plant your seed in the ground, place the milk carton over the top, and then push down to get it set in the dirt.
Check under your cloches frequently to be sure that the plants are getting enough water from the soil around them, that mold or moss are not growing in the cloche, and that the plant is not maxing out it's space.
(Strong little plants out of their cloches!)